And yes, the title is incredibly leading. If it were an article about how some republicans may choose to not concede, the article would be titled 'Why the GOP won't concede the election'. It should have been similarly titled for the Dems, but of course, it's not, because it's being normalized.
With regards to clinton... Another commenter posted articles linking to the tweet. And you're giving her more benefit of the doubt than trump. Trump has said he will concede if fair. You are now wondering if Clinton's call to not concede is really just a call to not concede until the election is fairly settled while attempting to draw a difference between the two.